Steve, I am so sorry you are having to make this decision. I have to agree with Dale, I would be inclined to trust Dr. B.'s instinct's and it seems like he is indicating revision surgery is the safest bet.
Wait and see is always an option, but I see too many people, who regrettably wait too long.
I am of the opinion that if you can do something now to head off disaster, you should do it. Your health is of utmost importance.
All that said, I'm sure you put a lot of money into going to Germany and having the first surgery. If there is any way that you can afford (well none of us can really "afford" this), to do it, I would do it as quickly as I could manage.
I can only give you a gentle cyber hug, and wish you the best luck with whatever decision you make.